Stop when the abrasive face develops shiny packed areas or the work shows dragged gray streaks. Continuing with more pressure is not a correction.
Start with washing, chemical decontamination approved for the coating, and a coating-specific maintenance or polishing route. Consider sanding only when the coating...
Pause the surface work and isolate four variables: abrasive cleanliness, pad condition, machine rotation, and extraction airflow. A finer disc cannot compensate for...
Diagnose the geometry before sanding again: repeated hooks suggest pigtails, broad arcs suggest machine motion, and a few straight deep lines point toward...
Backstep one grade only after proving the line is a surviving abrasive scratch rather than figure, glue, compression, or a finish defect.
Separate a stable cosmetic print-through pattern from movement or damage, then level the coating stack without sanding into reinforcement.
Separate a surface defect from rocking, flexing, or poorly supported work before changing the abrasive, block, or sanding pressure.
Distinguish moisture trapped in or under a clear film from a dark stain in the wood so a tabletop gets the smallest defensible repair.
Use stain type, dry state and defect depth to decide whether to redistribute color, add a compatible controlled color layer or strip and resand before clear finish.